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[" 2.Suppose "n" is a natural number suc...

[" 2.Suppose "n" is a natural number such that "],[" lit "2i^(2)+3i^(3)+...+ni^(n)|=18sqrt(2)" ,where "i" is the "],[" square root of - 1.Then "n" is - "],[[" (a) "9," (b) "18],[" (c) "36," (d) "72]]

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